WO2005009782A1 - Appui tete destine a empecher le coup du lapin - Google Patents

Appui tete destine a empecher le coup du lapin Download PDF

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Publication number
WO2005009782A1
WO2005009782A1 PCT/JP2003/009350 JP0309350W WO2005009782A1 WO 2005009782 A1 WO2005009782 A1 WO 2005009782A1 JP 0309350 W JP0309350 W JP 0309350W WO 2005009782 A1 WO2005009782 A1 WO 2005009782A1
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WIPO (PCT)
Prior art keywords
headrest
cervical vertebra
contact
occipital
occupant
Prior art date
Application number
PCT/JP2003/009350
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English (en)
Japanese (ja)
Inventor
Hiromichi Yamashita
Original Assignee
Hiromichi Yamashita
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hiromichi Yamashita filed Critical Hiromichi Yamashita
Priority to PCT/JP2003/009350 priority Critical patent/WO2005009782A1/fr
Priority to AU2003255154A priority patent/AU2003255154A1/en
Priority to JP2005504565A priority patent/JPWO2005009782A1/ja
Publication of WO2005009782A1 publication Critical patent/WO2005009782A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests

Definitions

  • the present invention relates to a headrest for a motor vehicle. More specifically, the present invention relates to a novel shaped headrest for preventing an occupant from having a so-called whiplash due to the impact of a car collision. Background art
  • Whiplash is a symptom that occurs when the trunk is pressed forward and the neck is shocked backwards, such as when the vehicle is hit by a car, causing damage to muscles, ligaments, joints, and sometimes the spinal cord. (Kojien Fifth Edition), but it is medically said to be traumatic cervical syndrome, and, of course, its definitive treatment methods, as well as its outbreak theory and defense methods, have not yet been fully established. Is the current situation.
  • a headrest body has a bag body filled with liquid and a seat body has a liquid discharge portion capable of receiving the liquid.
  • a headrest for draining liquid in the headless body into a seat in the event of a collision to reduce the impact for example, see Patent Document 1
  • a cushion member attached to a headrest frame A headrest in which a part of the cushion member is deformed under a low-speed load but has a small amount of deformation under a high-speed load when the outer periphery is surrounded by a skin member (for example, see Patent Refer to Reference 2), so that at least the occupant's head contact part of the head restraint is close to the occupant's head due to the impact at the time of a rear-end collision
  • a headless train equipped with air bleeding means for rapidly bleeding air from the cavity by operation for example, Patent Document 3
  • a headrest in which a support member enters the headrest body from the outside, and the headrest is
  • a holding member for holding the headrest at a predetermined rotational operation position is provided, while a sensor member for detecting a rear collision is provided on the headrest.
  • a headrest provided with a previous operating member for forcibly operating the headrest last time is provided on a vehicle seat, and is provided for a seated occupant.
  • An impact sensor that senses an impact at the time of a rear-end collision, and feedback control of the pillow attitude control mechanism so that an output of the contact pressure sensor matches a preset contact pressure reference value, and an output of the impact sensor is preset.
  • a tongue roller for fixing a pillow posture controlled by the pillow posture control mechanism when the collision impact reference value exceeds a predetermined rear impact collision reference value (for example, see Patent Document 7).
  • a headrest attached to the backrest of the seat provided on the vehicle and supporting the head of the occupant sitting on the seat, the headrest being strong only when the vehicle is stopped or running at low speed.
  • a headrest (for example, see Patent Literature 8) configured to be moved forward to make an abutment is fisted.
  • the headrest according to the present invention is characterized in that, in a headrest attached to the upper part of the chair back so that the upper and lower positions can be adjusted, the upper part of the headrest is formed and the lower part of the headrest is formed rather than the part supporting the back of the head.
  • the part that supports the cervical vertebra is made to protrude toward the seating side, and bulges are provided on both sides of the part that supports the cervical vertebra with at least a gap to accommodate the neck, and the bulge is provided.
  • the headrest for chairs is characterized in that the headrest is extended toward the upper part of the headrest so that the distance between them increases.
  • the purpose of this headrest is to provide a headrest for a chair with less muscle fatigue around the neck and is suitable for a chair with a swaying vehicle. It is intended to provide the most comfortable headrest assuming the use condition of the headrest.
  • the invention disclosed in Patent Document 9 does not intend to prevent occurrence of whiplash when a sudden impact such as a rear-end collision is given.
  • the headrest described in claim 1 of the present invention is designed such that the comfort from normal use results in that the occupant's neck to the back of the head fits perfectly between the side bulges. It has a shape. In this configuration, the occupant's occipital area, the mastoids of the temporal bones on both sides, the lower occipital area, and the cervical vertebrae all fit perfectly in the recess of the headrest and are cheap. Will be placed.
  • the headrest surface sandwiches the mastoids (bulges behind the ears) of the front of the occipital region and the temporal bones on both sides during a rear-end collision, causing a forward impact.
  • the occupant's head protrudes violently forward, generating a forward rotational moment about the neck, causing neck damage and causing whiplash.
  • the headrest must not contact the occipital posterior surface of the occupant and the mastoid of the temporal bones on both sides.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2000-29083
  • an object of the present invention is to develop and provide a headrest that can effectively and inexpensively prevent the occurrence of whiplash due to a rear-end collision accident.
  • the present inventors have solved the above-mentioned problem by providing a cervical vertebra of a normal person (first Fig. 2) and the typical cervical vertebrae of a whiplash patient (Fig. 2).
  • the largest load supported by the spine is the head.
  • the weight of the head is transmitted to the atlas (first cervical vertebra), the lordosis of the cervical vertebra (from the first cervical vertebra to the first thoracic vertebra), and the kyphosis of the thoracic vertebra (the second cervical vertebra).
  • the lumbar lordosis (from the 10th thoracic vertebra to the 5th lumbar vertebra) and the sacral kyphosis are transmitted sequentially, and are transmitted from the sacroiliac joint to the iliac lower limb and escape to the ground. Is done.
  • the posterior longitudinal ligament that extends to the posterior side of the vertebral body protects the basic form of lordosis and kyphosis. In other words, the lordosis and kyphosis play the role of the panel.
  • the spine is not just a superposition of columnar bones, but a circular or octagonal hole surrounded by a vertebral arch extends behind the columnar vertebral body, inside which an important central nervous trunk called the spinal cord is placed. I'm in it.
  • the spinal cord along with the brain, is wrapped in a tough membrane called the dura mater, soaked in cerebrospinal fluid.
  • the spine moves as shown in Fig. 5 and returns the cerebrospinal fluid to the head side by squeezing the dura mater through the posterior longitudinal ligament and hair-like connective tissue (see Fig. 4). Let me. Conversely, during exhalation, the spinal column moves as shown in Fig.
  • Fig. 8 shows a typical example of the headrest currently in use.However, when the occipital region is brought into contact with the headrest, the occipital region only touches the protruding part of the occipital region, and 5 No contact with cervical spine.
  • a headrest (a conceptual diagram is shown in Fig. 9) with a shape that cannot or does not easily contact the surface of the headrest.
  • the impact at the time of the rear-end collision first applies to the upper cervical vertebra and the fifth cervical vertebra of the occupant.
  • a rotational moment is generated rearward on the occupant's head, but this is supported by the surface of the headrest in contact with the lower surface of the occipital region.
  • the neck and head are integrated with the torso from the waist to the neck (in a rod shape) and rotate forward around the hip joint.
  • the occipital region is first subjected to an impact and a rotational moment about the neck is generated, so that a large impact is prevented from being applied to the neck and whiplash is prevented. It is done.
  • the shape of the headrest is different from the shape of the headrest disclosed in Patent Document 9, and the portion extending to the mastoid of the temporal bone and the posterior surface of the parietal bone on both sides of the occupant is formed by the headrest. The shape does not touch the surface. This is the biggest difference, with a totally different result in a rear-end collision. Disclosure of the invention
  • the outline of the present invention is as follows.
  • the present invention relates to a headrest which can be attached to the upper part of a chair backrest so that the position can be finely adjusted up and down, wherein the headrest is in contact with the lower surface of the occipital region of the occupant, the upper cervical vertebra and the fifth cervical vertebra at the same time.
  • the present invention relates to a headrest which can be attached to the upper part of the backrest of a chair so that the position of the headrest can be finely adjusted vertically, and the headrest simultaneously contacts the lower surface of the occupant's occipital region, the upper cervical vertebra and the fifth cervical vertebra.
  • a headrest that has a shape that fits and that has no bulging surface in contact with the lower back of the occipital region when the lower back surface of the occupant, upper cervical vertebra, and fifth cervical vertebra simultaneously contact the headrest. It relates to a headrest in which there is a gap of less than 4 cm, preferably less than 3 cm, more preferably less than 2 cm between the occiput's occipital projection and the opposing surface of the headrest.
  • the present invention relates to a headrest which can be attached to the upper part of a backrest of a chair so that the position can be finely adjusted vertically, and the headrest simultaneously contacts the lower surface of the occipital region of the occupant, the upper cervical vertebra and the fifth cervical vertebra.
  • the present invention relates to a headrest which can be attached to the upper part of the backrest of a chair so that the position can be finely adjusted vertically, and the headrest simultaneously contacts the lower surface of the occipital region of the occupant, the upper cervical vertebra and the fifth cervical vertebra.
  • the present invention relates to a headrest which can be attached to the upper part of a chair backrest so that the position can be finely adjusted up and down, wherein the headrest is in contact with the lower surface of the occipital region of the occupant, the upper cervical vertebra and the fifth cervical vertebra at the same time.
  • the headrest that is protruding to the seating side in the area The present invention relates to a headrest which can be attached to the upper part of a chair backrest so that the position can be finely adjusted vertically, and the headrest simultaneously contacts the lower surface of the occupant's back of the head, the upper cervical vertebra and the fifth cervical vertebra.
  • a headrest that has a shape that erodes and has a shape that does not bulge in contact with the lower surface of the occipital region, the surface that erodes the upper cervical vertebra and the fifth cervical vertebra does not contact the seventh cervical vertebra As described above, wherein the headrest is retracted with respect to the seating side.
  • the present invention is further characterized in that the headrest of the present invention is used by being fixed to a seat back so that the headrest, the upper cervical vertebra and the fifth cervical vertebra are simultaneously in contact with a passenger sitting on the seat. It also relates to how to use the headrest.
  • the present invention provides the headrest of the present invention by adjusting the distance between the headrest of the present invention and the backrest, so that the headrest of the individual occupant can be positioned on the lower back of the head.
  • the present invention relates to a method of using the headrest of the present invention, which is adjusted so as to simultaneously contact the cervical vertebra and the fifth cervical vertebra and then fixed to the backrest.
  • Figure 1 is a lentogen photograph of the cervical spine of a normal person.
  • Figure 2 is a radiograph of the cervical spine of a whiplash patient.
  • Figure 3 is an illustration showing the shape of the main skeleton from the head to the waist of a normal person.
  • FIG. 4 is a schematic view of a cross-sectional view of a spine. The relationship between hair-like connective tissue, posterior longitudinal ligament and vertebral bodies is shown.
  • 1 1 is hair-like connective tissue
  • 1 2 is posterior longitudinal ligament
  • 13 is vertebral body
  • 14 is intervertebral disc
  • 15 is dura
  • 16 is spinous process
  • 17 is cerebrospinal fluid
  • 18 Represents the spinal cord, respectively.
  • Fig. 5 shows the physiological movement of the spinal column during inspiration and the direction of cerebrospinal fluid return in the spinal canal.
  • the white arrow (21) indicates the direction of cerebrospinal fluid return.
  • FIG. 6 shows the physiological movement of the spinal column during exhalation and the direction of cerebrospinal fluid return within the spinal canal.
  • the white arrow (22) indicates the direction of cerebrospinal fluid return.
  • FIG. 7 is also a cross-sectional view of the spine, showing the hair-like connective tissue broken. In the figure, 19 indicates a damaged portion of the hair-like connective tissue.
  • FIG. 8 is a schematic diagram showing a state of contact between a normal headrest and a passenger's head.
  • 1 indicates an occipital projection.
  • FIG. 9 shows that the lower back of the occupant's head, the upper cervical vertebra and the fifth cervical vertebra are simultaneously in contact with the headrest of the present invention and effectively supported when the headrest of the present invention is used.
  • FIG. 10 is a perspective view of one example of the headrest of the present invention.
  • FIG. 11 is a side view of an example of the headrest of the present invention. Surfaces A to H to G and B shown by dotted lines are cross-sectional views of the head contact surface of the conventional headrest.
  • the cross-sectional view of the head contact surface of the headrest according to the present invention is added for comparison with A to H to E to F and B.
  • the dotted line E-G indicates the length of the E-F surface protruding from the headrest surface (HA ah surface) behind the occipital protrusion to the seating side.
  • H is a portion facing the occipital projection of the headrest of the present invention
  • E to F are surfaces in contact with the upper cervical vertebra and the fifth cervical vertebra of the headrest of the present invention. Is a surface that comes into contact with the lower surface of the back of the head of the present invention.
  • FIG. 12 is a front view of the headrest of the present invention.
  • FIG. 13 is a top view of the headrest of the present invention.
  • Fig. 14 is an illustration showing the impact on the body of an occupant who is not using a headrest when the vehicle is impacted from behind.
  • Fig. 15 is an illustration showing the impact of the body of the occupant using a normal headrest when the vehicle is impacted from behind.
  • FIG. 16 is an illustration showing an impact received by the occupant's body when using a headrest of the type that comes into contact with the occipital region of the occipital region and the temporal bone mastoid as in Patent Document 9.
  • reference numeral 20 denotes a temporal bone mastoid.
  • FIG. 17 is an illustration showing the force received by the occupant using the headrest of the present invention when the vehicle is hit from behind.
  • FIG. 9 is a conceptual diagram showing how the headrest of the present invention makes contact from the head to the neck of the occupant. That is, when the headrest of the present invention is used, the lower surface of the occupant's occipital region, the upper cervical vertebra and the fifth cervical vertebra come into contact with the headrest surface, and the occipital protruding portion of the occupant and the mastoid of the temporal bone become the headrest surface.
  • the distance between the occipital projection and the headrest surface is usually less than about 4 cm, preferably less than about 3 cm, more preferably less than about 2 cm, and even more preferably less than about 1 cm.
  • most of the conventional headrests are in contact with the occupant's head at one location, that is, only at the protruding part of the back of the head, as shown in a typical example in FIG. No headrests in contact with the upper cervical vertebrae and the fifth cervical vertebra were found, much less the occipital protuberance and the temporal bone mastoids, but only on the lower occipital region, the upper cervical vertebra and the fifth cervical vertebra. There is no headrest in contact with and supporting this.
  • the headrest of the present invention can The head is once subjected to a rotational moment backward because the impact force is applied only to the upper cervical vertebra and the fifth cervical vertebra, but this is first supported by the headrest surface in contact with the lower back of the occipital region.
  • FIG. 10 is a perspective view of an example of the headrest of the present invention.
  • the headrest of the present invention contacts the lower surface of the occupant's back of the head, the upper cervical vertebra and the fifth cervical vertebra (hereinafter also referred to as the head and neck), but contacts the occipital protrusion of the occupant and the mastoid of the temporal bones on both sides. It is important to note that when using the headrest of the present invention, the surface of the headrest is the lower surface of the occupant's back of the head, the upper cervical vertebra, and the fifth cervical vertebra. It must be used to touch parts.
  • the headrest may At the moment of contact with the neck, it is necessary to set the height of the headrest so that it is in the same condition as above. Otherwise, passengers cannot be protected from whiplash in a rear-end collision.
  • the shape of the headrest is Considering the case where each passenger actually uses the vehicle, even if the conditions are satisfied, there is a difference in sitting height between the passengers, so that the cervical vertebra contact portion of the headrest of the present invention and the passenger are seated in the vehicle seat.
  • the headrest of the present invention It is indispensable to adjust the height of the headrest of the present invention so that the position of the cervical vertebrae in the case of the present invention exactly matches. Therefore, when the headrest of the present invention is mounted on a seat of a vehicle, it is essential to provide a mechanism between the headrest and the seat that can freely adjust the height of the headrest. Headrests equipped with a height adjustment mechanism that can be used for such purposes are already commercially available, and by using any of these headrest height adjustment mechanisms, the capability of the headrest of the present invention can be improved. The effects of the present invention can be exerted to the fullest extent.
  • the headrest of the present invention can be mounted on the occipital lower surface contact portion and the cervical vertebra contact portion of the headrest of the present invention by adjusting the height of the headrest according to the occupant.
  • the contact with the lower surface of the occipital region, the upper cervical vertebra and the fifth cervical vertebra is satisfied, and a headrest having the same shape as the headrest of the present invention is fixedly attached to a vehicle seat, or Even if the seat back itself has a shape similar to the headless of the present invention, the headrest of the present invention generally has a whiplash-preventing effect, except in rare cases where the occupant's sitting height satisfies the above conditions. It is clear that no fruit is produced.
  • FIG. 11 is a conceptual view of a side view of an example of the headrest of the present invention
  • FIG. 12 is a conceptual view of a front view of an example of the headrest of the present invention
  • FIG. 11 is a conceptual view of a side view of an example of the headrest of the present invention
  • FIG. 12 is a conceptual view of a front view of an example of the headrest of the present invention
  • FIG. 1 is a conceptual diagram of a top view of a headrest according to an example of the present invention.
  • the part surrounded by ABCD in Fig. 11 is a conceptual diagram of a side view of a conventional headrest.
  • the surfaces A to B in Fig. 11 (8 and 8 in Fig. 12) that is, the surface of the headrest that comes into contact with the occipital projection of the occupant are convex or concave in the center. It may be curved, but most of it is almost flat.
  • the position where H in FIG. 11 (approximately the center of H—h in FIG.
  • the H-E plane in Fig. 11 (HE eh plane in Fig. 12) is the plane that comes into contact with the lower surface of the occupant's back of the head. As is evident from Fig.
  • the skeleton of the human occipital region forms a curve, so that the lower surface of the occipital region and the E-H surface in Fig. It is preferable to be raised upward as going to. Furthermore, it is preferable that the planes E to H in Fig. 11 be concavely curved so as to draw a curve in the direction of E-H that matches the curve of the lower surface of the occupant's lower head. Yes.
  • the E-e direction there must not be large bulges on both sides. Especially, there must not be bulges that touch the mastoid of the temporal bone.
  • the E to F planes in FIG. 11 are the planes in contact with the upper cervical vertebra and the fifth cervical vertebra.
  • the feature of the present invention is that the E to F planes in FIG. 11 (E e F f planes in FIG. 12) are larger than the A to H planes in FIG. 11 (Hh G g planes in FIG. 12). It is protruding forward.
  • the planes E to F in Fig. 11 (EeFf plane in Fig.
  • the planes H to G in FIG. 11 protrude forward from the planes E to F in FIG. 11, and the lengths of E to G are almost 0 cm or minus.
  • the planes E to F in Fig. 11 project forward from the planes H to G, and the length of E to G in Fig. 11 is usually from about 2 cm to about 15 cm. Ranges from about 3 cm to about 12 cm, more preferably from about 4 cm to about 8 cm.
  • the E to F planes in Fig. 11 (E e F f planes in Fig. 12) may be flat, but are concavely curved toward the center along the line E- e.
  • the length of E—F (e ⁇ f) in FIG. 11 is a length that allows simultaneous contact with the upper cervical vertebra and the fifth cervical vertebra, usually from about 2 cm to about 15 cm, preferably about It is from 3 cm to about 10 cm, more preferably from about 4 cm to about 8 cm.
  • the length of HG in FIG. 11 indicates the vertical distance between the height of the occipital protrusion of the occupant and the upper end of the contact surface of the upper cervical vertebrae, and may be generally 3 cm or more.
  • the distance between the headrest surface behind the occipital projection of the occupant and the occipital projection is usually less than 4 cm, preferably less than 3 cm, and more preferably less than 2 cm. If the planes E to F in Fig. 11 extend beyond the upper cervical vertebra and fifth cervical vertebra and reach the seventh cervical vertebra or above, move downward along the line EF from the point beyond the sixth cervical vertebra. As it goes, it is preferred that the surface be retracted posteriorly so that the E e F f surface of FIG. 12 does not contact the seventh cervical vertebra. This is to eliminate discomfort caused by the headrest surface pressing on the seventh cervical vertebra. Therefore, in this case, it is preferable that the length of FB (f-b) is shorter than the length of EG (eg).
  • the feature of the headrest of the present invention is the shape of the surface of the headrest that simultaneously contacts the lower surface of the occupant's back of the head, the upper cervical vertebra, and the fifth cervical vertebra. Therefore, the shape of other parts of the headrest is not particularly limited.
  • the width of the headrest can be freely designed as long as it does not interfere with its use as a headrest, usually from about 15 cm to about 40 cm, preferably from about 20 cm to about 20 cm. It is in the range of about 30 cm. If the height of the headrest does not affect the normal use of the headrest, an arbitrary height can be set above H in Fig. 11.
  • the C c D d surface on the back of the headrest and the A a C c surface on the top of the headrest Any shape can be used as long as it does not affect normal dressing. Also, the shape of the left and right side surfaces of the headrest can be freely designed as long as it does not hinder the use as a normal headrest.
  • the shape of the bottom of the headrest is not particularly limited. Normally, two support rods are attached to the bottom to fix the headrest to the seat, but it can also be attached using conventional methods. As described above, since it is a reality that passengers have various sitting heights, to use the headrest of the present invention, the surface of the headrest of the present invention, the lower surface of the occipital region of the passenger, and the upper cervical vertebrae are used.
  • the stepless height adjustment mechanism of the headrest used in a normal headrest can be used as it is.
  • the height of the backrest of the seat to which the headrest of the present invention is attached is limited to the shoulder of a low-seat passenger, and in the case of a high-seat passenger, the height of the headrest is adjusted to adjust the cervical spine of the headrest. It is preferable that the contact part and the occupant's cervical vertebra are fitted together.
  • the materials for manufacturing the headrest of the present invention are the same as those used for manufacturing a normal headrest.
  • the core material includes polyurethane foam, polystyrene foam, ABS foam, vinyl chloride resin foam, and polyethylene foam.
  • Rigid foams such as polypropylene foam, phenolic resin foam, and urea resin foam may be used. It may be covered with a flexible or semi-rigid foam such as polyurethane foam, vinyl chloride resin foam, polyethylene foam or polypropylene foam. Further, the surface may be covered with cloth, natural leather, synthetic leather, artificial leather, or the like.
  • the headrest of the present invention By using the headrest of the present invention, the upper cervical vertebra and the 5th cervical vertebra are subjected to an impact on the head and cervix from the rear due to a rear-end collision, etc. As a result, the entire upper body is integrally fixed and receives a rotational moment about the hip joint, and as in the case of a conventional headrest, a large forward force is applied only to the back of the head, There is no generation of a rotational moment about the cervical vertebra and the fifth cervical vertebra, and the occurrence of so-called whiplash can be effectively prevented.
  • FIGS. 14 to 17 the effects of the present invention will be described in detail with reference to FIGS. 14 to 17. First, what happens when a rear-end collision occurs when there is no headrest will be described with reference to FIG.
  • the lower cervical, thoracic and lumbar vertebrae and the upper sacrum are pushed forward, the entire head is pushed backwards, the upper head is pushed backwards, and the lower head is pushed forward and upwards.
  • the lower part of the sacrum is pushed upward.
  • the lower part of the fifth cervical vertebra is pushed forward, and the head is left behind while generating a moment of rotation backward, so that the upper part is pushed out posterior and lower from the fourth cervical vertebra, and the vertebral body
  • the posterior longitudinal ligament which secures the posterior aspect of the cervical vertebra, is damaged, causing the fourth cervical vertebra to slip backwards and lose cervical lordosis.
  • the occipital bone shifts forward, and the joint with the first cervical vertebra shifts more forward than usual.
  • Fourth cervical vertebral body especially its lower end, compresses the posterior dural space, obstructs cerebrospinal fluid circulation, and has various symptoms such as headache, dizziness, nausea, decreased motivation, tinnitus, poor vision, and general malaise
  • the following describes what happens when a rear-end collision occurs when a conventional headrest is installed.
  • the lower cervical and thoracic vertebrae are pushed forward. However, the entire head is once pushed out backward, but since there is a headrest in contact with the upper part of the head, only the upper part of the head is pushed forward by the headrest.
  • the first to fifth cervical vertebrae all shift posteriorly. Then, at the time of restoring the posture, the curved portions (lordosis) of the fourth and fifth cervical vertebrae disappear and become straight, or a reverse curve, that is, cervical kyphosis occurs. Of course, the posterior longitudinal ligament is also damaged, especially in the fourth and fifth cervical vertebrae.
  • the joint between the occipital bone and the first cervical vertebra can be either an anterior shift (overextended) or a posterior shift (hyperflexion) relative to the cervical vertebra.
  • the lumbar spine and sacrum are weakened in kyphosis in response to the head, the upper sacrum shifts backward, and the lower sacrum and ischium shift forward. Again, the major damage is likely to be in the loose hair-like connective tissue between the posterior longitudinal ligament and the dura. In addition, the possibility of low back pain increases due to the imbalance of the spine.
  • a headrest such as that of Patent Document 9 that encloses the entire occipital bone and temporal bone mastoid, the mastoid is pushed largely forward at the beginning, so that the head has a normal headrest Even more, a large forward rotation moment is generated, and the human body is seriously damaged as shown in Fig. 16 It causes whiplash and is dangerous.
  • the headrest of the present invention completely solves all the above problems.
  • the headrest of the present invention has a shape that simultaneously contacts the lower surface of the occupant's back of the head, the upper cervical vertebra, and the fifth cervical vertebra. Therefore, when a rear-end collision occurs, as shown in FIG. 17, the occupant of the vehicle equipped with the headrest of the present invention firstly has the upper cervical vertebra and the fifth cervical vertebra, followed by the occipital protuberance. From the vertebrae of the upper spine (cervical vertebra), the kyphosis of the middle part (thoracic vertebra) and the lordosis of the lower part (lumbar vertebrae) in an instant.
  • the present invention was invented and developed based on the fact that the applicant, a physician, discovered from clinical experience the overall defense reaction of spinal column integration that occurs when the inferior occipital region, upper cervical vertebra, and fifth cervical vertebra were fixed. It is a thing. Industrial applicability
  • the headrest of the present invention for a vehicle seat or the like, damage to the hair-like connective tissue of the cervical vertebrae and damage to the posterior longitudinal ligament at the time of a rear-end collision of a car, which is seen when a conventional headrest is mounted, In the event of a rear-end collision of a car, etc., it is possible to reliably and inexpensively prevent the occurrence of so-called whiplash caused by the application of a strong rotational moment about the cervical spine to the head.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)

Abstract

Cette invention se rapporte à un appui tête qui entre simultanément en contact avec la partie inférieure de l'arrière de la tête, avec la partie supérieure des vertèbres cervicales et avec la partie de la cinquième vertèbre cervicale, de façon à soutenir ces parties, lorsqu'un véhicule est heurté par l'arrière, ainsi qu'à un procédé d'utilisation de cet appui tête. Dans cette invention, on empêche les lésions des tissu conjonctifs tricoïdes et des ligaments verticaux postérieurs des vertèbres cervicales, lors de l'application soudaine d'une force de torsion sur les vertèbres cervicales de la tête du conducteur ou du passager, sous l'effet du choc d'une collision par l'arrière, empêchant ainsi efficacement le coup du lapin.
PCT/JP2003/009350 2003-07-23 2003-07-23 Appui tete destine a empecher le coup du lapin WO2005009782A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2003/009350 WO2005009782A1 (fr) 2003-07-23 2003-07-23 Appui tete destine a empecher le coup du lapin
AU2003255154A AU2003255154A1 (en) 2003-07-23 2003-07-23 Head rest for whiplash prevention
JP2005504565A JPWO2005009782A1 (ja) 2003-07-23 2003-07-23 鞭打ち症防止用ヘッドレスト

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009042564A2 (fr) 2007-09-24 2009-04-02 Polyone Corporation Concentré de couleur liquide pour articles en polyester
WO2014168583A1 (fr) * 2013-04-08 2014-10-16 Singapore Technologies Aerospace Ltd Structure de repose-tête, coussin de repose-tête et siège passager
US9352675B2 (en) 2011-09-21 2016-05-31 Herman Miller, Inc. Bi-level headrest, body support structure and method of supporting a user's cranium
IT201800010160A1 (it) * 2018-11-08 2020-05-08 Matteo Tomaiuolo "poggiatesta per veicoli atto a limitare i danni da colpi di frusta"

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181763A (en) * 1990-09-20 1993-01-26 Ronald P. Dellanno Apparatus for preventing whiplash
JP2002153350A (ja) * 2000-11-22 2002-05-28 Rofutee Kk ヘッドレスト用枕
JP3091897U (ja) * 2002-08-05 2003-02-21 宮▲崎▼ キヨ子 自動車のシート枕

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181763A (en) * 1990-09-20 1993-01-26 Ronald P. Dellanno Apparatus for preventing whiplash
JP2002153350A (ja) * 2000-11-22 2002-05-28 Rofutee Kk ヘッドレスト用枕
JP3091897U (ja) * 2002-08-05 2003-02-21 宮▲崎▼ キヨ子 自動車のシート枕

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009042564A2 (fr) 2007-09-24 2009-04-02 Polyone Corporation Concentré de couleur liquide pour articles en polyester
US9352675B2 (en) 2011-09-21 2016-05-31 Herman Miller, Inc. Bi-level headrest, body support structure and method of supporting a user's cranium
WO2014168583A1 (fr) * 2013-04-08 2014-10-16 Singapore Technologies Aerospace Ltd Structure de repose-tête, coussin de repose-tête et siège passager
US9783304B2 (en) 2013-04-08 2017-10-10 Singapore Technologies Aerospace Ltd. Headrest structure, headrest cushion and passenger seat
IT201800010160A1 (it) * 2018-11-08 2020-05-08 Matteo Tomaiuolo "poggiatesta per veicoli atto a limitare i danni da colpi di frusta"

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JPWO2005009782A1 (ja) 2006-11-09
AU2003255154A1 (en) 2005-02-14

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